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and markers also have time and index attributes. The index attribute is not the number (name) of the marker; it is the keyframe index number, representing the order of the marker in the time ruler. Expressions have access to all of the values for a marker that you can set in the Composition Marker or Layer Marker dialog box. This expression on the Source Text property of a text layer displays the time, duration, index, comment (name), chapter, URL, frame target, and cue point name for the layer marker nearest the current time, and whether the marker is for an event cue point: m = thisLayer.marker.nearestKey(time); s = "time:" + timeToCurrentFormat(m.time) + "\r" + "duration: " + m.duration + "\r" + "key index: " + m.index + "\r" + "comment:" + m.comment + "\r" + "chapter:" + m.chapter + "\r" + "URL:" + m.url + "\r" + "frame target: " + m.frameTarget + "\r" + "cue point name: " + m.cuePointName + "\r" + "Event cue point? " + m.eventCuePoint + "\r"; for (param in m.parameters){ s += "parameter: " + param + " value: " + m.parameters[param] + "\r"; } s Because the XMP metadata in a footage item can be converted into layer markers for a layer based on that item, expressions can interact with XMP metadata. For information, see XMP metadata in After Effects. Dan Ebberts provides a tutorial on the After Effects Developer Center that includes an example of using XMP metadata with expressions. duration Return type: Number. Duration, in seconds, of marker. comment Return type: String. Contents of Comment field in marker dialog box. chapter Return type: String. Contents of Chapter field in marker dialog box. url Return type: String. Contents of URL field in marker dialog box. frameTarget Return type: String. Contents of Frame Target field in marker dialog box. eventCuePoint Return type: Boolean. Setting for cue point type in marker dialog box. True for Event; false for Navigation. cuePointName Return type: String. Contents of cue point Name field in marker dialog box. parameters Return type: associative array of String values. Contents of Parameter Name and Parameter Value fields in marker dialog box. For example, if you have a parameter named "background color", then you can use the following expression to access its value at the nearest marker: thisComp.marker.nearestKey(time).parameters["background color"] More Help topics Legal Notices | Online Privacy Policy

Section	Page
What's New	2
What's new in CS6	3
What’s new in After Effects CS5.5	8
What’s new in After Effects CS5	9
After Effects getting started tutorials	15
Learn After Effects CS5 and CS5.5	16
Planning and setup	18
Setup and installation	22
Workflows	24
Workspace and workflow	27
Setup and installation	28
Workflows	30
Planning and setup	33
Working with After Effects and other applications	37
Dynamic Link and After Effects	43
Workspaces, panels, and viewers	46
General user interface items	51
Keyboard shortcuts reference	54
Modify keyboard shortcuts	72
Preferences	73
Projects and compositions	76
Projects	77
Timecode and time display units	80
Composition basics	82
Precomposing, nesting, and pre-rendering	87
Importing footage	92
Importing and interpreting video and audio	93
Working with footage items	98
Importing from After Effects and Adobe Premiere Pro	103
Importing and interpreting footage items	107
Preparing and importing 3D image files	118
Preparing and importing still images	121
Layers and properties	128
Creating layers	129
Selecting and arranging layers	133
Managing layers	141
Layer properties	145
Blending modes and layer styles	153
3D layers	158
Cameras, lights, and points of interest	163
Views and previews	171
Previewing	172
Modifying and using views	181
Animation and Keyframes	185
Animation basics	186
Setting, selecting, and deleting keyframes	189
Editing, moving, and copying keyframes	192
Assorted animation tools	196
Keyframe interpolation	202
Speed	207
Tracking and stabilizing motion	213
Tracking 3D Camera Movement (CS6)	225
Animating with Puppet tools	228
Time-stretching and time-remapping	234
Color	241
Color basics	242
Color management	250
Drawing, painting, and paths	258
Paint tools: Brush, Clone Stamp, and Eraser	259
Overview of shape layers, paths, and vector graphics	266
Creating shapes and masks	271
Managing and animating shape paths and masks	279
Shape attributes, paint operations, and path operations for shape layers	287
Text	293
Creating and editing text layers	294
Formatting characters and the Character panel	299
Formatting paragraphs and the Paragraph panel	304
Animating text	306
Extruding text and shape layers (CS6)	315
Examples and resources for text animation	320
Transparency and compositing	325
Compositing and transparency overview and resources	326
Alpha channels, masks, and mattes	328
Keying	337
Roto Brush and Refine Matte	340
Effects and animation presets	345
Effects and animation presets overview	346
Effect list	368
3D Channel effects	376
Audio effects	381
Blur & Sharpen effects	384
Channel effects	390
The rolling shutter repair effect (CS6)	395
Color Correction effects	396
Distort effects	408
Generate effects	421
Keying effects	435
Matte effects	443
Noise & Grain effects	445
Obsolete effects	459
Perspective effects	463
Simulation effects	467
Stylize effects	488
Text effects	497
Time effects	499
Transition effects	504
Utility effects	510
Markers	514
Layer markers and composition markers	515
XMP metadata	519
Memory, storage, performance	524
Memory and storage (CS5.5, and earlier)	525
Improve performance	531
GPU (CUDA, OpenGL) features in After Effects CS6	534
Memory and storage (CS6)	536
Expressions and automation	544
Plug-ins	545
Scripts	547
Automation	549
Expression basics	550
Expression language reference	561
Expression examples	578
Rendering and Exporting	582
Basics of rendering and exporting	583
Rendering and exporting for Flash Professional and Flash Player	596
Rendering and exporting still images and still-image sequences	602
Automated rendering and network rendering	604
Converting movies	610

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and markers also have time and index attributes. The index attribute is not the number (name) of the marker; it is the keyframe index number,

representing the order of the marker in the time ruler.

Expressions have access to all of the values for a marker that you can set in the Composition Marker or Layer Marker dialog box. This expression

on the Source Text property of a text layer displays the time, duration, index, comment (name), chapter, URL, frame target, and cue point name

for the layer marker nearest the current time, and whether the marker is for an event cue point:

m = thisLayer.marker.nearestKey(time);

s = "time:" + timeToCurrentFormat(m.time) + "\r" +

"duration: " + m.duration + "\r" +

"key index: " + m.index + "\r" +

"comment:" + m.comment + "\r" +

"chapter:" + m.chapter + "\r" +

"URL:" + m.url + "\r" +

"frame target: " + m.frameTarget + "\r" +

"cue point name: " + m.cuePointName + "\r" +

"Event cue point? " + m.eventCuePoint + "\r";

for (param in m.parameters){

s += "parameter: " + param + " value: " + m.parameters[param] + "\r";

}

Because the XMP metadata in a footage item can be converted into layer markers for a layer based on that item, expressions can interact with

XMP metadata. For information, see XMP metadata in After Effects.

Dan Ebberts provides a tutorial on the

After Effects Developer Center

that includes an example of using XMP metadata with expressions.

duration

Return type: Number.

Duration, in seconds, of marker.

comment

Return type: String.

Contents of Comment field in marker dialog box.

chapter

Return type: String.

Contents of Chapter field in marker dialog box.

url

Return type: String.

Contents of URL field in marker dialog box.

frameTarget

Return type: String.

Contents of Frame Target field in marker dialog box.

eventCuePoint

Return type: Boolean.

Setting for cue point type in marker dialog box. True for Event; false for Navigation.

cuePointName

Return type: String.

Contents of cue point Name field in marker dialog box.

parameters

Return type: associative array of String values.

Contents of Parameter Name and Parameter Value fields in marker dialog box.

For example, if you have a parameter named “background color”, then you can use the following expression to access its value at the nearest

marker:

thisComp.marker.nearestKey(time).parameters["background color"]